Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)

We evaluated experimentally the effect of a gall-maker insect on vegetative and reproductive traits of the shrub Colliguaja integerrima (Euphorbiaceae). We performed two experiments: (1) a chemical (insecticide) exclusion to prevent gall formation, and (2) a mechanical removal of new galls at the ea...

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Autores principales:	GONZÁLES,WILFREDO L., CABALLERO,PAULA P., MEDEL,RODRIGO
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2005
Materias:	bud-galling insect central Chile Mediterranean ecosystem
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000300003
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spelling	oai:scielo:S0716-078X20050003000032005-10-28Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)GONZÁLES,WILFREDO L.CABALLERO,PAULA P.MEDEL,RODRIGO bud-galling insect central Chile Mediterranean ecosystem We evaluated experimentally the effect of a gall-maker insect on vegetative and reproductive traits of the shrub Colliguaja integerrima (Euphorbiaceae). We performed two experiments: (1) a chemical (insecticide) exclusion to prevent gall formation, and (2) a mechanical removal of new galls at the early stage to prevent gall growth. In the study area, galled shrubs were common (77 %). Because the pattern of insect attack may influence plant fitness, the distribution of egg clusters deposited by the galler and the number of galls among shrubs were also evaluated. Fruit production was inversely associated with the number of galls, but did not correlate with shrub height, shrub cover, and number of shoots. Ungalled shoots were longer than galled shoots after 12 months initiated the experiment. Chemical exclusion produced a delayed positive effect on plant reproduction. Fruit production was higher in experimental than control branches after 24 months. Mechanical removal of galls increased fruit production in comparison to control branches in the next reproductive season. These results indicate that the galler reduces shoot growth, and has a delayed detrimental impact on fruit production of C. integerrima. Because the chance of finding new galls was higher on the previously infected shrubs, it is possible that reinfection processes account for the cumulative negative effects of the bud-galling insect on plant fitnessinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.78 n.3 20052005-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000300003en10.4067/S0716-078X2005000300003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	bud-galling insect central Chile Mediterranean ecosystem
spellingShingle	bud-galling insect central Chile Mediterranean ecosystem GONZÁLES,WILFREDO L. CABALLERO,PAULA P. MEDEL,RODRIGO Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)
description	We evaluated experimentally the effect of a gall-maker insect on vegetative and reproductive traits of the shrub Colliguaja integerrima (Euphorbiaceae). We performed two experiments: (1) a chemical (insecticide) exclusion to prevent gall formation, and (2) a mechanical removal of new galls at the early stage to prevent gall growth. In the study area, galled shrubs were common (77 %). Because the pattern of insect attack may influence plant fitness, the distribution of egg clusters deposited by the galler and the number of galls among shrubs were also evaluated. Fruit production was inversely associated with the number of galls, but did not correlate with shrub height, shrub cover, and number of shoots. Ungalled shoots were longer than galled shoots after 12 months initiated the experiment. Chemical exclusion produced a delayed positive effect on plant reproduction. Fruit production was higher in experimental than control branches after 24 months. Mechanical removal of galls increased fruit production in comparison to control branches in the next reproductive season. These results indicate that the galler reduces shoot growth, and has a delayed detrimental impact on fruit production of C. integerrima. Because the chance of finding new galls was higher on the previously infected shrubs, it is possible that reinfection processes account for the cumulative negative effects of the bud-galling insect on plant fitness
author	GONZÁLES,WILFREDO L. CABALLERO,PAULA P. MEDEL,RODRIGO
author_facet	GONZÁLES,WILFREDO L. CABALLERO,PAULA P. MEDEL,RODRIGO
author_sort	GONZÁLES,WILFREDO L.
title	Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)
title_short	Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)
title_full	Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)
title_fullStr	Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)
title_full_unstemmed	Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)
title_sort	galler-induced reduction of shoot growth and fruit production in the shrub colliguaja integerrima (euphorbiaceae)
publisher	Sociedad de Biología de Chile
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000300003
work_keys_str_mv	AT gonzaleswilfredol gallerinducedreductionofshootgrowthandfruitproductionintheshrubcolliguajaintegerrimaeuphorbiaceae AT caballeropaulap gallerinducedreductionofshootgrowthandfruitproductionintheshrubcolliguajaintegerrimaeuphorbiaceae AT medelrodrigo gallerinducedreductionofshootgrowthandfruitproductionintheshrubcolliguajaintegerrimaeuphorbiaceae
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Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)

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